Dynamo-electric machine



' (No Model.) 2 Sheets-Sheet 1.

H. B. SHERIDAN.

DYNAMO ELECTRIC MACHINE.

No. 256,391. Pa.tq ;c d Apr. 11,1882.

WITNESSES INVENTOR ATTORNEYS.

N. PETERS. mwiithognpbcn \Vznhinpom u. c.

2 Sheets-Sheet 2.

(No Model.)

H. .B. SHERIDAN.

DYNAMO ELECTRIC MACHINE. No. 256,391., Patented Ap1 n11, 1882-.

INVBNTOR ATTORNEYS.

N. PETERS. Phow-Lnhugnphec wamn mn. D. c.

UNITED STATES PATENT OFFICE.

IIENRY B. SHERIDAN, OF CLEVELAND, OHIO.

DYNAMQ-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 256,391, dated April 11, 1882.

Application filed July 19, 1881.

To all whom itmay concern:

Be it'known that -I, HENRY B. SnEnrDAN, of Cleveland, Ouyahogacounty, and State of Ohio, have invented a new and useful Improvement in Dynamo-Electric Machines, of which the following is a full, clear, and exact description.

In ,the accompanying drawings, Figure 1,

Sheet 1, is a side elevation, partly in section,

of my improvement. Fig. 2, Sheet 1, is a plan view, partly in section, of the same. Fig. 3, Sheet 2, is a sectional end elevation of the same, taken through the line as or, Fig.1, showing one magnet in end view and the other in section and with the helix-wires removed. Fig. 4, Sheet 2, is a side elevation of the armature, partly in section through the line 3 y, Fig. 1. Fig. 5, Sheet 2, shows a modification ot' the machine. Fi 6, Sheet 2, is a sectional plan view of the same, taken through the line c 2, Fig. 5.

Similar letters of reference indicate corresponding parts.

The object of this invention is to increase the efficicncy of dynamo-electric machines.

The invention consists in the armature constructed of a hollow iron ring, rectangular in its cross-section, and with its sides converging or inclined inward from the convex side toward the concave side; also, in the hollow-ring armature made with corresponding openings in its convex and concave sides and projections of uniform thickness uponits inclined or converging sides, whereby the outer part of the armature is brought nearer to the magnetic field of force than the inner part; also, in the hollow-ring armature made with two series of projections of different shape, alternating with each other, the projections of the'one series being made V-shaped or with converging sides and the projections of the other series being made with slightly-inclined or converging sides and V -shaped ends, whereby channels or grooves of uniform width are formed to receive the helix-coils; also, in the combination, with the armature having lugs and the armatureshaft, of the hubs having flanges, whereby the said armature will be firmly connected with the said shaft; also, in the combination, with the armature and the armature-shaft, of the stationary magnet-cores and the helices, the said (No model.)

bed-plate A, and having bearings in which revolves the shaft 0 that carries the armature. The standards B also form the seats and supports for the stationary magnet-cores E, around which are wound helices F ofinsnlated copper wire. The magnet-cores E stand with their axes in a spiral line of convenient direction and pitch around the axis of the shaft 0. IVith this arrangement the stationary magnetcores present an oblong field of force to the armature, thelength of the field of force depending upon the pitch of the magnetcores E and their inclination from the axis of the shaft 0. The magnctcores E are arranged with the longest diameters of their fields of force in the direction in which the armature revolves, by which arrangement the projections of the armature will remain long in the field of force, and the generated currents will thus be considerably in creased.

One of the magnet-cores E, with the surrounding helix F, can he one pole of an electromagnet, or two or more of the said cores Ecan be connected on their faces by a plate, G, and thus form only one pole of an electromagnet.

As shown in Figs. 1, 2, and 3, each standard B has two magnets, each formed of two magnet-cores, E, connected at theirpolesbyaplate, G; but four or more magnets can be used upon each standard, if desired.

The armature-core D is made in the form of a hollow iron ring, and is nearly rectangular in itscross-section. Thesidesofthearmature-core converge slightly from the convex side of the said ring to its concave side, as shown in Fig. 1. In the convex side of the armature-core D are formed a number ofopenings, H,- and in the concave side are formed a corresponding numher ot openings, I, as shown in Figs. 1, 2, and at. Upon the sides of the armature-coreD are formed projections J K, the outer surfaces of which converge or incline so as to be parallel with the sides of the body of the said armature. The projections J are made V-shaped, and terminate at or near the concave side of the armature-core D, or may extend in a thin blade a little beyond the said concave side of the armature-core D. The sides of the projections K are slightly inclined or converged to or nearly to the concave side of the armature-core D, and are made Vshapcd,and terminate at or a little beyond the said concave side of the said armature.

The outer ends of the projections J K may terminate at the convex side of the armaturecore D, or may project a little beyond the said convex side. The projections J K thus form grooves or channels of uniformwiilth, in each of which is wound a single helix, L, of insulated copper wire. The outer end of each helix-wire L is connected with the inner end of the next helix-wire L, and both are connected with one of the sections of the commutator M, the number of sections of the commutator M being equal to the number of helices L when only one commutator is used. hen two commutators M are used, as shown in Fig. 2, the outer end of the helix is connected with the inner end of the third helix, and both are connected with a section of one of the commutators M, and the outer end of the second helix is connected with the inner end of the fourth helix, and both are connected with a section of the other commutator. In this case each commutator has half as many sections as the armature has helices. Upon the side edges of the inwardly-projectingends of the projections K are formed projections or lugs N, which engage with the flanges O of the hubs P, placed upon and secured to the shaft C, that carries the commutators M, so that the armature D, when expanded by heating, will be held firmly in place.

The armature-core D can be made in segments or sections, whit-h will be held together at the concave side of the said armature by the interlocking of the'lngs N with the flanges 0 of the hubs P, and at the convex side of the said armature by screws Q, and lugs It, as shown in Fig. 4. y

S are brushes or springs which rest upon the commutator M and make the connection between the helices L of the armature and the helices F of the electro-magnets. The helices F are wound with their coils parallel with the field of magnetic force, instead of being wound at right angles with the magnet-cores E, as shown in Figs. 1 and 2.

I In case the machine is constructed for the armature to revolve inside of the series of electro-magnets, rows of magnet-cores E are placed in spiral lines around the armature-shaft 0, each core E being radial to the said sha t, as shown in Figs. 5 and 6. Two, four, or more of the magnet-cores E can be placed around the armature I), being secured at their outer ends to a ring, hollow cylinder, or other suitable support. Several magnet-cores E can be used for one magnet, or a single core can be placed in a spiral line around the armature.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a dynamo-electric machine, the armatore-core D, constructed, substantially as herein shown and described, of a hollow iron ring nearly rectangular in its cross-section and with sides converging or inclined inward from the convex side toward the concave side, as set forth.

2. In a dynamo-electric machine, the armature-core D, constructed, substantially as herein shown and described, of a hollow iron ring having corresponding openings, II I, in its convex and concave sides, and 'irojections form ing channels of uniform width upon its inclined or converging sides, as set forth.

3. In a dynamo-electric machine, the armature-core D, constructed, substantially as herein shown and described, of a hollow iron ring having upon its sides projections J K of dit ferent thicknesses,alternating with each other and projecting beyond the concave side of the core, the projections J being made Vshapcd, or with sides converging to an edge, and the projections K being made with slightly inclined or converging sides and V-shaped ends, wherebychannels or grooves of uniform width are formed to receive the helix-coils, as set forth.

4. In a dynamo-electric machine, the combination, with the armature-core D, having lugs N, and the armature-shaft U, of the hubs P, having flanges O, substantially as herein shown and described, whereby the said armature will be firmly connected with the said shaft, as set forth.

5. In a dynamo-electric machine, the combination, with the armature and the armatureshaft 0, of the stationary magnet-cores E and the helices I substantially as herein shown and described, the said cores being placed spirally around the armature-shaft and at an inclination with the said armature-shaft, and the said helices being wound with their coils parallel with the magnetic field of force, as set forth.

HENRY 13. SHERIDAN.

Witnesses:

JAMES T. GRAHAM, G. Snncwrcx. 

